Temperature sensing cable and temperature sensing alarm device

Abstract

The utility model discloses a temperature sensing cable and a temperature sensing alarm device. The temperature sensing cable comprises a temperature sensing semiconductor film layer, a metal conductive cell and a fusible alloy cell. Wherein the resistance value of the temperature-sensing semiconductor film layer is reduced along with the rise of the temperature; the temperature-sensing semiconductor film layer wraps the metal conductor cell, the fusible alloy cell is arranged on the surface of the temperature-sensing semiconductor film layer, and the temperature-sensing cable realizes real-time monitoring of the whole area of the device to be detected, so that the temperature-sensing range of the temperature-sensing cable is larger.

Description

Technical Field

[0001] The utility model relates to the technical field of temperature sensing cables, in particular to a temperature sensing cable and a temperature sensing alarm device. Background Art

[0002] With the development of society, the demand for temperature sensing devices is becoming more and more extensive. However, the temperature sensing devices in the prior art have a small temperature sensing area and cannot fully monitor the device to be tested, and cannot meet the existing monitoring needs. Utility Model Content

[0003] The utility model provides a temperature sensing cable and a temperature sensing alarm device, so as to realize real-time monitoring of the entire area of ​​a device to be tested, so that the temperature sensing range of the temperature sensing cable is larger.

[0004] According to one aspect of the utility model, a temperature sensing cable is provided, the temperature sensing cable comprising:

[0005] A temperature-sensitive semiconductor film layer, a metal conductive battery cell and a fusible alloy battery cell; wherein the resistance value of the temperature-sensitive semiconductor film layer decreases with increasing temperature;

[0006] The temperature-sensitive semiconductor film layer wraps the metal conductive battery core, and the fusible alloy battery core is arranged on the surface of the temperature-sensitive semiconductor film layer.

[0007] Furthermore, the temperature-sensitive semiconductor film layer and the fusible alloy battery core are twisted together.

[0008] Furthermore, the temperature sensing cable also includes:

[0009] Outer sheath;

[0010] The outer sheath is used to wrap the temperature-sensitive semiconductor film layer, the metal conductive battery core and the fusible alloy battery core.

[0011] Furthermore, the temperature sensing cable also includes:

[0012] Polyester strapping;

[0013] The polyester tape is arranged between the outer sheath and the temperature-sensitive semiconductor film layer and the fusible alloy core, and the polyester tape is used for winding the temperature-sensitive semiconductor film layer and the fusible alloy core.

[0014] Furthermore, the temperature-sensitive semiconductor film layer includes an NTC film layer.

[0015] According to another aspect of the present invention, a temperature sensing alarm device is provided, the temperature sensing alarm device comprising:

[0016] An alarm circuit, a terminal resistor, and a temperature sensing cable as described in any of the above embodiments;

[0017] The first end of the metal conductive cell is connected to the first end of the alarm circuit, the second end of the metal conductive cell is connected to the first end of the terminal resistor, the second end of the terminal resistor is connected to the first end of the fusible alloy cell, and the second end of the fusible alloy cell is connected to the alarm circuit;

[0018] The alarm circuit is used to output a first signal to the first end of the metal conductive battery cell, detect a second signal output from the second end of the fusible alloy battery cell, and issue a high temperature alarm according to the second signal.

[0019] Further, the alarm circuit includes a signal transmission circuit, a signal processing circuit and an alarm;

[0020] The signal transmission circuit is connected to the signal processing circuit, and the signal transmission circuit is used to output a first signal to the first end of the metal conductive battery cell, receive a second signal output by the second end of the fusible alloy battery cell, and transmit the second signal to the signal processing circuit;

[0021] The signal processing circuit is used for comparing the currently received second signal with the setting signal and outputting an alarm control signal to the alarm.

[0022] Further, the signal processing circuit includes a comparator;

[0023] The first end of the comparator is connected to the signal transmission circuit, the second end of the comparator is used to receive the setting signal, and the output end of the comparator is connected to the alarm;

[0024] The comparator is used for comparing the second signal with the setting signal and outputting an alarm control signal to the alarm.

[0025] Furthermore, the temperature sensing alarm device also includes:

[0026] Power connection device;

[0027] The first end of the power connection device is connected to the power source, and the second end of the power connection device is connected to the alarm circuit.

[0028] The embodiment of the utility model provides a temperature-sensing cable, including a temperature-sensing semiconductor film layer, a metal conductive battery core and a fusible alloy battery core. The temperature-sensing semiconductor film layer wraps the metal conductive battery core, and the fusible alloy battery core is arranged on the surface of the temperature-sensing semiconductor film layer, so that the resistance of the temperature-sensing cable can change with the change of temperature, and when the temperature is too high, the fusible alloy battery core in the temperature-sensing cable can be melted, thereby changing the connection relationship between the temperature-sensing cable and the external circuit, causing the signal detected by the circuit to suddenly change, and monitoring the temperature around the temperature-sensing cable is achieved by monitoring the resistance of the temperature-sensing cable, and by winding the temperature-sensing cable around the surface of the device to be tested, real-time monitoring of the entire area of ​​the device to be tested is achieved, so that the temperature sensing range of the temperature-sensing cable is larger.

[0029] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present utility model, nor are they intended to limit the scope of the present utility model. Other features of the present utility model will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of 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 creative work.

[0031] Figure 1 It is a structural schematic diagram of a temperature sensing cable provided according to an embodiment of the utility model;

[0032] Figure 2 It is a structural schematic diagram of a temperature sensing alarm device provided according to an embodiment of the utility model;

[0033] Figure 3 It is a schematic diagram of the internal resistance of a temperature sensing alarm device according to an embodiment of the utility model changing with temperature;

[0034] Figure 4 It is a structural schematic diagram of another temperature sensing alarm device provided according to an embodiment of the utility model;

[0035] Figure 5 It is a structural schematic diagram of another temperature sensing alarm device provided according to an embodiment of the utility model;

[0036] Figure 6 It is a structural schematic diagram of another temperature sensing alarm device provided according to an embodiment of the utility model. DETAILED DESCRIPTION

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

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

[0039] The utility model provides a temperature sensing cable. Figure 1 is a structural schematic diagram of a temperature sensing cable provided according to an embodiment of the utility model, Figure 2 is a schematic diagram of a temperature sensing alarm device according to an embodiment of the present invention, referring to Figure 1 and Figure 2 , temperature sensing cables include:

[0040] A temperature-sensitive semiconductor film layer 1, a metal conductive battery core 2 and a fusible alloy battery core 3; wherein the resistance value of the temperature-sensitive semiconductor film layer 1 decreases with increasing temperature;

[0041] The temperature-sensitive semiconductor film layer 1 wraps the metal conductor battery core 2 , and the fusible alloy battery core 3 is arranged on the surface of the temperature-sensitive semiconductor film layer 1 .

[0042] The material used for the temperature-sensitive semiconductor film layer 1 is a semiconductor material with a thermosensitive property. The fusible alloy battery cell 3 can be made of different materials according to the required alarm temperature.

[0043] Specifically, the temperature sensing alarm device can be formed by connecting the alarm circuit 6 and the terminal resistor R at both ends of the temperature sensing cable. Figure 2As shown, the first end of the metal conductive core 2 can be connected to the first end of the alarm circuit 6, the second end of the metal conductive core 2 can be connected to the first end of the terminal resistor R, the second end of the terminal resistor R can be connected to the first end of the fusible alloy core 3, and the second end of the fusible alloy core 3 can be connected to the alarm circuit 6. The temperature sensing cable is wound around the object to be monitored. At this time, the alarm circuit 6 connects the temperature sensing semiconductor film layer 1 and the terminal resistor R in parallel through the metal conductive core 2 and the fusible alloy core 3. If the object to be monitored is abnormal, a local high temperature will appear at a certain position of the temperature sensing cable. When the high temperature reaches the melting point of the fusible alloy core 3, the fusible alloy core 3 will break. At this time, the connection between the fusible alloy core 3 and the terminal resistor R is disconnected, and the alarm circuit 6 is only connected to the temperature sensing semiconductor film layer 1 through the metal conductive core 2 and the fusible alloy core 3. The connection resistance of the alarm circuit 6 increases drastically. During the temperature measurement process of the temperature sensing cable, the connection resistance of the alarm circuit 6 will first decrease and then increase sharply as the temperature increases. The current signal detected by the alarm circuit 6 will first increase and then decrease sharply as the temperature increases. The moment the connection between the fusible alloy battery cell 3 and the terminal resistor R is disconnected is the cliff-like transition point of the connection resistance. At this time, the current signal detected by the alarm circuit 6 decreases sharply, and the alarm circuit 6 will issue a high temperature alarm.

[0044] The embodiment of the utility model provides a temperature-sensing cable, comprising a temperature-sensing semiconductor film layer 1, a metal conductive battery core 2 and a fusible alloy battery core 3. The temperature-sensing semiconductor film layer 1 wraps the metal conductive battery core 3, and the fusible alloy battery core 3 is arranged on the surface of the temperature-sensing semiconductor film layer 1, so that the resistance of the temperature-sensing cable can change with the change of temperature, and when the temperature is too high, the fusible alloy battery core 3 in the temperature-sensing cable can be melted, thereby changing the connection relationship between the temperature-sensing cable and the external circuit, causing the signal detected by the circuit to suddenly change, and monitoring the temperature around the temperature-sensing cable is achieved by monitoring the resistance of the temperature-sensing cable, and by winding the temperature-sensing cable around the surface of the device to be tested, real-time monitoring of the entire area of ​​the device to be tested is achieved, so that the temperature sensing range of the temperature-sensing cable is larger.

[0045] For further information, please refer to Figure 1 The temperature-sensitive semiconductor film layer 1 and the fusible alloy battery core 3 are twisted together.

[0046] Specifically, the temperature-sensitive semiconductor film layer 1 and the fusible alloy core 3 are twisted together to ensure that the temperature-sensitive semiconductor film layer 1 is in full contact with the fusible alloy core 3. Furthermore, when the temperature is monitored by the temperature-sensitive cable, if the fusible alloy core 3 is blown, it can ensure that the fusible alloy core 3 is in normal contact with the temperature-sensitive semiconductor film layer 1, and the resistance of the temperature-sensitive cable can be monitored, thereby realizing the monitoring of the temperature around the temperature-sensitive cable.

[0047] Furthermore, the temperature sensing cable also includes:

[0048] Outer sheath 4;

[0049] The outer sheath 4 is used to wrap the temperature-sensitive semiconductor film layer 1 , the metal conductive battery core 2 and the fusible alloy battery core 3 .

[0050] Specifically, the material of the outer sheath 4 can be an insulating and elastic material such as plastic, and the embodiment of the utility model is not limited to this. By wrapping the outer sheath 4 around the temperature-sensitive semiconductor film layer 1, the metal conductive battery core 2 and the fusible alloy battery core 3, the internal temperature-sensitive semiconductor film layer 1, the metal conductive battery core 2 and the fusible alloy battery core 3 can be protected.

[0051] Furthermore, the temperature sensing cable also includes:

[0052] Polyester tape 5;

[0053] The polyester tape 5 is disposed between the outer sheath 4 and the temperature-sensitive semiconductor film layer 1 and the fusible alloy core 3 , and the polyester tape 5 is used to wrap the temperature-sensitive semiconductor film layer 1 and the fusible alloy core 3 .

[0054] Specifically, a polyester tape 5 is arranged between the outer sheath 4 and the temperature-sensitive semiconductor film layer 1 and the fusible alloy core 3, so that the connection between the temperature-sensitive semiconductor film layer 1 and the fusible alloy core 3 can be made more compact. When temperature monitoring is performed through the temperature-sensitive cable, if the fusible alloy core 3 is blown, it can further ensure that the fusible alloy core 3 is in normal contact with the temperature-sensitive semiconductor film layer 1.

[0055] Furthermore, the temperature-sensitive semiconductor film layer includes an NTC film layer.

[0056] The utility model embodiment provides a temperature sensing alarm device, referring to Figure 2 , the temperature sensing alarm device includes:

[0057] An alarm circuit 6, a terminal resistor R and a temperature sensing cable as described in any of the above embodiments;

[0058] The first end of the metal conductive cell 2 is connected to the first end of the alarm circuit 6, the second end of the metal conductive cell 2 is connected to the first end of the terminal resistor R, the second end of the terminal resistor R is connected to the first end of the fusible alloy cell 3, and the second end of the fusible alloy cell 3 is connected to the alarm circuit 6;

[0059] The alarm circuit 6 is used to output a first signal to the first end of the metal conductive battery cell 2, detect a second signal output from the second end of the fusible alloy battery cell 3, and issue a high temperature alarm according to the second signal.

[0060] Specifically, the temperature sensing cable can be wound around the object to be monitored. At this time, the alarm circuit 6 connects the temperature sensing semiconductor film layer 1 in parallel with the terminal resistor R through the metal conductive battery 2 and the fusible alloy battery 3. If the object to be monitored is abnormal, it will cause local high temperature at a certain position of the temperature sensing cable. When the high temperature reaches the melting point of the fusible alloy battery 3, the fusible alloy battery 3 breaks. At this time, the connection between the fusible alloy battery 3 and the terminal resistor R is disconnected, and the alarm circuit 6 is only connected to the temperature sensing semiconductor film layer 1 through the metal conductive battery 2 and the fusible alloy battery 3. The connection resistance of the alarm circuit 6 increases drastically. For example, Figure 3 Schematic diagram of the internal resistance of a temperature sensing alarm device according to an embodiment of the present utility model changing with temperature. Figure 3 As shown, during the temperature measurement process of the temperature sensing cable, the connection resistance of the alarm circuit 6 will first decrease and then increase drastically as the temperature increases, and the current signal detected by the alarm circuit 6 will first increase and then decrease drastically as the temperature increases. The moment when the connection between the fusible alloy core 3 and the terminal resistor R is disconnected is the cliff transition point of the connection resistance, that is, Figure 3 The hot spot in is the cliff-like transition point of the connection resistance. At this time, the alarm circuit 6 can compare the second signal detected and outputted by the second end of the fusible alloy battery cell 3 with the received setting signal, and the alarm circuit 6 will issue a high temperature alarm according to the comparison result.

[0061] The temperature sensing alarm device designed in the embodiment of the utility model includes an alarm circuit 6, a terminal resistor R and the temperature sensing cable described in any of the above embodiments. By connecting the first end of the metal conductive core 2 to the first end of the alarm circuit 6, the second end of the metal conductive core 2 to the first end of the terminal resistor R, the second end of the terminal resistor R to the first end of the fusible alloy core 3, and the second end of the fusible alloy core 3 to the alarm circuit 6, the alarm circuit 6 can detect the second signal output by the second end of the fusible alloy core 3 in real time, and issue a high temperature alarm when the second signal first increases and then decreases. When the temperature is too high, the fusible alloy core 3 in the temperature sensing cable can be melted, thereby changing the connection relationship between the temperature sensing cable and the external circuit, causing the signal detected by the circuit to mutate. By monitoring the resistance of the temperature sensing cable, the temperature around the temperature sensing cable is monitored, and by winding the temperature sensing cable around the surface of the device to be tested, the overall area of ​​the device to be tested is monitored in real time, so that the temperature sensing range of the temperature sensing cable is larger.

[0062] Furthermore, Figure 4 is a schematic diagram of another temperature sensing alarm device provided according to an embodiment of the utility model, referring to Figure 4 , the alarm circuit 6 includes a signal transmission circuit 61, a signal processing circuit 62 and an alarm 63;

[0063] The signal transmission circuit 61 is connected to the signal processing circuit 62. The signal transmission circuit 61 is used to output a first signal to the first end of the metal conductive battery cell 2, receive a second signal output from the second end of the fusible alloy battery cell 3, and transmit the second signal to the signal processing circuit 62.

[0064] The signal processing circuit 62 is used to compare the currently received second signal with the setting signal, and output an alarm control signal to the alarm 63 .

[0065] The setting signal may be set according to the fuse resistance of the fusible alloy cell 3 and the first signal outputted by the signal transmission circuit 61 to the first end of the metal conductive cell 2 , and the first signal may be a voltage signal.

[0066] Specifically, after receiving the second signal output by the second end of the fusible alloy cell 3, the signal transmission circuit 61 transmits the second signal to the signal processing circuit 62. At the same time, the signal processing circuit 62 also receives the setting signal. At this time, the signal processing circuit 62 compares the currently received second signal with the setting signal, and when the comparison result changes, outputs an alarm control signal to the alarm 63.

[0067] Furthermore, Figure 5 is a schematic diagram of the structure of another temperature sensing alarm device provided according to an embodiment of the utility model, referring to Figure 5 , the signal processing circuit includes a comparator 621;

[0068] A first end of the comparator 621 is connected to the signal transmission circuit 61, a second end of the comparator 621 is used to receive a setting signal, and an output end of the comparator 621 is connected to the alarm 63;

[0069] The comparator 621 is used to compare the second signal with the setting signal and output an alarm control signal to the alarm 63 .

[0070] Specifically, after receiving the second signal output by the second end of the fusible alloy cell 3, the signal transmission circuit 61 transmits the second signal to the comparator 621. At the same time, the comparator 621 also receives the setting signal. At this time, the comparator 621 compares the currently received second signal with the setting signal. When the comparison result changes, when the second signal is less than the setting signal, the signal output by the comparator 621 triggers the alarm 63 to sound an alarm.

[0071] Furthermore, Figure 6 is a schematic diagram of the structure of another temperature sensing alarm device provided according to an embodiment of the utility model, referring to Figure 6 , the temperature sensing alarm device also includes:

[0072] Power connection device 7;

[0073] A first end of the power connection device 7 is connected to a power source, and a second end of the power connection device 7 is connected to an alarm circuit 6 .

[0074] Specifically, a power connection device 7 is provided in the temperature sensing alarm device, which can provide electric energy to the alarm circuit 6 through an external power supply.

[0075] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be performed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0076] The above specific implementations do not constitute a limitation on the protection scope of the present utility model. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A temperature sensing cable, characterized in that: include: A temperature-sensitive semiconductor film layer, a metal conductive battery core and a fusible alloy battery core; wherein the resistance value of the temperature-sensitive semiconductor film layer decreases with increasing temperature; The temperature-sensitive semiconductor film layer wraps the metal conductive battery core, and the fusible alloy battery core is arranged on the surface of the temperature-sensitive semiconductor film layer.

2. The temperature sensing cable according to claim 1, characterized in that: The temperature-sensitive semiconductor film layer and the fusible alloy electric core are twisted together.

3. The temperature sensing cable according to claim 1, characterized in that: Also includes: Outer sheath; The outer sheath is used to wrap the temperature-sensitive semiconductor film layer, the metal conductive battery core and the fusible alloy battery core.

4. The temperature sensing cable according to claim 3, characterized in that: Also includes: Polyester strapping; The polyester tape is arranged between the outer sheath and the temperature-sensitive semiconductor film layer and the fusible alloy core, and the polyester tape is used to wrap the temperature-sensitive semiconductor film layer and the fusible alloy core.

5. The temperature sensing cable according to claim 1, characterized in that: The temperature-sensitive semiconductor film layer includes an NTC film layer.

6. A temperature sensing alarm device, characterized in that: include: An alarm circuit, a terminal resistor, and a temperature sensing cable according to any one of claims 1 to 5; The first end of the metal conductive cell is connected to the first end of the alarm circuit, the second end of the metal conductive cell is connected to the first end of the terminal resistor, the second end of the terminal resistor is connected to the first end of the fusible alloy cell, and the second end of the fusible alloy cell is connected to the alarm circuit; The alarm circuit is used to output a first signal to the first end of the metal conductive battery cell, detect a second signal output from the second end of the fusible alloy battery cell, and issue a high temperature alarm according to the second signal.

7. The temperature sensing alarm device according to claim 6, characterized in that: The alarm circuit includes a signal transmission circuit, a signal processing circuit and an alarm; The signal transmission circuit is connected to the signal processing circuit, and the signal transmission circuit is used to output a first signal to the first end of the metal conductive battery cell, receive a second signal output by the second end of the fusible alloy battery cell, and transmit the second signal to the signal processing circuit; The signal processing circuit is used for comparing the second signal currently received with a setting signal, and outputting an alarm control signal to the alarm.

8. The temperature sensing alarm device according to claim 7, characterized in that: The signal processing circuit includes a comparator; The first end of the comparator is connected to the signal transmission circuit, the second end of the comparator is used to receive a setting signal, and the output end of the comparator is connected to the alarm; The comparator is used for comparing the second signal with the setting signal and outputting an alarm control signal to the alarm.

9. The temperature sensing alarm device according to claim 6, characterized in that: Also includes: Power connection device; The first end of the power connection device is connected to the power source, and the second end of the power connection device is connected to the alarm circuit.

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